Handcuff key



FIG. 1 is a back view of the handcuff key, showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a left end view thereof; and,

FIG. 5 is a right end view thereof.

The disclosure shown in broken-lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a handcuff key, as shown and described. 